Glass-drawing apparatus.



H. F. HITNER.

GLASSDRAWING APPARATUS.

APPLICATION FILED JULY 6,1911- RENEWED OCT. 15. 1914.

Km 1 9L 1T R 1 T. N M m s E3 n 4% a P 1 v7 7 8 w 8 08 A w WITH ESSES i H. F. HITNER. I GLASS DBAWING-APPARATUSL APPLICATION FILED JULY 6, 1911. RENEWED OCT. 15, i914.

1,138,870, Patented May 11, 1915.

3 SHEETS-SHEET 2- H. F; HITNER.

GLASS DRAWING APPARATUS. APPLICATION FILED JULY 6.1911. RENEWED OCT. 15. 1914.

, 1,138,870; Patent-ed Ma 11',1915.

3 SHEETS-SHEET 3.

WITN ESSES INVENTOR 7 State of Ohio,

.T-Z"B;Y F. EITHER, F MOUNT VERNON, OHIO, ASSIG-NGR TO THE PITTSBULRGGP TE GLASS COMPANY, 01*" PITTSBURGH, PENNSYLVANKA, A CQZRPGRATION 9F PENN- GlzQSS-DRAWING APZPAMTUS.

To all whom it may concern Be itknown that 1, Hanan F. Hrrnnn, a citizen of the United States, residing at Mount Vernon, in the county of Knox and have invented certain new and useful .llmprovementsin Glass-Drawing Apparatus, of which the following is a specification.

The invention relates to. apparatus employed in drawing glass cylinders for the manufacture of window glass and particularly'to the apparatus for raising and lowering the top stoneand to the means for shifting the cover of the top stone. The invention hastorits primary objects; the provision of improved means for giving the top stone adefinite vertical movement and one in which the topstone may be stopped in its lowermost'pcsition without diiiiculty; and the provision of shifting the cover of the top stone laterally from its position over the top stone and then returning it to position. Certain embodiments of the invention are illustrated in the accompanying drawings, wherein Figure 1 is a side elevation of the apparatus with the furnace and top stone in section, Fig. 2 is a section of the apparatus taken on the line 11-11 of Fig. 1, Fig. 3

illustrates a modified arrangement for raising and lowering the top stone, and Fig. 4 is an enlarged detail of the contact mechanism employed in the apparatus of Fig. 3.

Referring to the structures shown in Figs. 1 and 2; 1 is the furnace structure, a portion only of which is shown; 2 is a vertically movable top stone provided with the usual drawing opening 3 through which the glass cylinder is to be drawn; 4 is aremovable cover mounted over the opening 3 in the top stone; 5, 6 and 7 are beams constituting a supporting framework; 8 and 9 are cables for shifting the cover 4 laterally; 10 and 11' are cables for securing the vertical reciprocation of the top stone 2; and 12 and 13' are motors for actuating the cable operating means.

There are two each of the cables 10 and 11, the lower ends of which are secured to rings carried by the top stone 2, so that such top stone has four points of support and is therefore maintained in a uniformly level position. The upper ends of the cables 10 and 11 17, carried by the framework, and are at- Specification of Letters Patent.

improved means for I electric lamp pass over the pulleys 14, 15, 16 and Patented Mayli, 1915.

637,150. Itenewed'flctober 15, 1914. Serial No. 866,381.

shaft 19. The shaft 13 carries the gear 20 driven from the gear 21, such gear 21 bein mounted upon the same shaft with the worm-wheel 22 driven by the worm 23 carried on the of the motor 13. It will be seen that while the crank pins 18 are rotating through a 180 degrees from the position shown, the top'stone 2 will be lowered, the distance lowered being equal to the throw of the crank pins, and that as the crank pins rotate through the next 180 degrees, the top stone will be raised to its original position. In this manner a continuous forward rotation of the crank pins secures the lowering and raising of the top stone.

In order that the operator'inay be accurately informed as to the moment when the top stone 2 reaches its lowermost position, the indicator 24 is provided. This lamp is in an electric circuit 2526, which is completed when the contacts 27-28 engage the metal contact member 28, thus lighting the lamp, at which time the operator opens the switch 29 in the motor circuit 30-31, thus stopping the motor.

There are two each of the cables 8 and 9, the lower ends of the pairs of cables being secured to blocks 32 securely fastened to the opposite sides of the cover 4. The upper ends of these cables pass over the pulleys 33 and 34, the portions of the cables 8 below the pulleys 33 being substantially vertical, while the portions of the cables 9 below the pulleys 34 extend diagonally. The ends of the cables 8 and 9 are secured to the crank pins 35 and 36, and the rotation of these crank pins causes the raising and lowering of the cables and the consequent shifting of the cover 4. The arrangement of mocha nism for actuating the crank pins 35 and 36 will be best seen by reference to Fig. 2. From this figure it will be seen that the crank ins 35 and 36 are mounted -upon crank disks 37 and 38 carried by the shafts 39 and 40. The shaft 39 is driven from the motor 12 by means of the gears 41, 42 and 43 actuated from the worm 44 (Fig. 1), and the shaft is driven from the shaft 39 by means of the gears 45 and 46. The motor 12 is controlled by the switch 47 in the circuit 48-49 (Fig. 1). In order to shift the cover 4, the parts being in the position indicated in Fig. 1, the motor 12 is started, causing the disks with their crank pins 35 and 36 to rotate in the direction indicated by the arrows (Fig. 1). The rotation of the crank pins draws the cables 8 and 9 upward, the cover first moving upward a slight distance, and then moving laterally along the line 50 until the members 32 reach the point 51, at which time the cables 8 and 9 will have shifted theirpositions to those as indicated in dotted lines. At this time the crank pins 35 and 36 will have moved 180 degrees to the position indicated in dotted lines. A further rotation of the crank pins permits the cables 8 and 9 to move downward, and the cover to return to its original position, the path of travel of the members 32 being indicated by the dotted line 52. The return movement of the cover could also be accomplished after the members 32 had reached the point 51, by reversing the motor 12 instead of running it continuously ahead. It is however, more convenient to run the motor continuously ahead to secure both shifting movements, rather than reverse the motor to secure such movements. It will be understood that the term cables as applied to the members 8, 9, 10 and 11 is used generically to mean any and all kinds of flexible supporting members, whether composed of links or strands and regardless of the material employed.

In Fig. 3 a slightly modified arrangement for raising and lowering the top stone is shown. In this construction, the cables 53.

and 54 supporting the top stone 2 pass over the pulleys 55, 5G and 57 and are secured at their upper ends to the crank pin 58 carried by the crank 59. This crank 59 is rotated from the shaft 60 by means of the worm 61 operating the worm wheel 62, the worm 61 being carried by the shaft of the motor 63. The motor is controlled from the circuit 6-l65 by means of the switch 66. An indicating lamp 67 is provided tosignal the arrival of the top stone at its lowest position, such lamp 67 being in the incomplete circuit 68G9. This circuit is completed by the arrangement indicated in Fig. 4, the crank 59 being provided with a spring adapted to contact with the spring 71. This spring 71 is connected to the wire 69, and the other wire 68 of the circuit is secured to a spring 7 1 bearing upon the shaft 60, the current passing from the wire 68 to the wire 69 via the spring 71, shaft 60, crank 59 and contact members 70 and 71 when such members engage.

Having thus described my invention and illustrated its use, what I claim as new and desire to secure by Letters Patent is the following 1. In glass drawing apparatus, the combination with a furnace anda vertically movable top stone having a glass drawing opening, of means for giving the top stone a fixed vertical movement of reciprocation, comprising a cable extending upward from the top stone, a crank provided with a laterally projecting member to which the upper end of the cable is secured, and means for rotating the crank, the throw of the crank being such as to give the top stone the desired range of movement, and arranged so that the top stone is lifted during one half of the forward rotation of the crank and lowered during the other half of such forward rotation.

2. In glass drawing apparatus, the combination with a furnace and a vertically movable top stone having a glass drawing opening, of means for giving the top stone a fixed vertical movement of reciprocation, comprising a plurality of cables extending upward from the top stone, a crank provided with a laterally projecting member to which the upper ends of the cables are secured, and means for rotating the crank, the throw of the crank being such as to give the top stone the desired range of movement, and arranged so that the top stone is lifted during one half of the forward rotation of the crank and lowered during theother half of such forward rotation.

3. In glass drawing apparatus, the combination with a furnace and a vertically movable top' stone having a glass drawing opening, of means for giving the top stone a fixed vertical movement of reciprocation, compris ing a cable extending upward from the top stone, a crank provided with a laterally projecting member to which the upper end of the cable is secured, means for rotating the crank, the throw of the crank being such as to give the top stone the desired range of movement, and arranged so that the top stone is lifted during one half of the forward rotation of the crank and lowered during the other half of such forward movement, and an indicator actuated by the rotation of the crank for giving a signal when the top stone reaches its lower position.

4. In glass drawing apparatus, the combination with a furnace, a vertically movable top stone having a glass drawing opening and a cover therefor, of means for shifting the cover laterally comprising two cables scoured to the cover, one of which extends upward substantially vertically and the other of which extends upward diagonally to the side to which the cover is to be shifted, and means for actuating the cables to give the cover an upward and a lateral movement.

5. In glass drawing apparatus, the combination with a furnace, a vertically movable top stone having a glass drawing opening and a cover therefor, of means for shifting the cover laterally, comprising two cables secured to the cover, one of which, extends upward substantially vertically and the other of which extends upwardly diagonally to the side to which the cover is to ,be shifted, and means for' actuating the cable to give the cover an upward and a lateral movement, such means comprising a pair of cranks to which the ends of the cables are attached and arranged so that durin one half of their rotary movements the ca les are pulled upward to raise the cover and shift it later- .subscribing witnesses.

ally, and during the other half of such movements the cover is shifted back to position over the top stone.

In testimony whereof I have hereunto 15' signed my name in the presence of the two BANNER M. ALLEN, E. L. CRIDER. 

